mittag



F. O. NIITTAG.

BOAT. APPLICATION FILED MAYI. I9l9`l 1 ,307,878 Patented June 24, 1919.

s SHEETS-SHEET z.

Mum-

ffnung 1H: wnnms #grens co.. woraufhin wasn/Nc mm n4 c.

Mfg; v

F. o. MITTAG.

` lso/L APPLICATION F'ILED MAY 1,-1919.

1,307,873.. Patented June 24, 1919.

3 SHEETS-SHEET 2.

F. O. lVIlTTAG.

BOAT.

APPLICATION FILED MAY I, 1919.

mimic.. msn/Nauw, n a

aan

Pateted June 24, 1919.

a SHEETS-SMU 3.

@Iton/lig UNITED sTATEs vPATENT oEEIoE.

FRANK 0. MITTAG, OCE PARK RIDGE, NEW JERSEY.

" a" j v i BOAT.`

Specication of Letters Patent. Patented J 11110 24;, 1919.

Application nea Mayi, i919. seriai No. 293,983.

To all 'whom t 'may concern j Be it known that I, FRANK() MITTAG, a citizen of the United States, and a resident of Park Ridge, in the county of Bergen and State of New Jersey, have ijn-- vented certain new and useful Improvea specification. j j. l

The invention resides in a novel type and construction of boat to be driven by power. `One object of the invention is to provide a highsspeed boat whichwill ridesteadily through and to a large extent on or over the surface of the water and have no tendency `to turn over.

The boat of my invention has a hull which l j' site sides of the" boat, 11 the bow, 12 the `'bottom and 13 the stern, which, as shown is comparatively wide and long and formed with a bottom which is longitudinally concaved from bow to stern andwith sides which are substantially parallel from the bow to the stern of the boat and are charac` l terized by being concavely curved from their upper to their lower` edges. The lower portions of the sidesof the boat extend outbottom of the boat meet one another at a sharp angle, the bottom of the boatextending directly upwardly and inwardly from the lower edges of said sides andl said sides curving .upwardly` and inwardly from the saidsideedges of said bottom.r My `and the formation of the bottom of the boat boat when viewed from` above presents substantially an oblong. outline as distinguished i lfrom highl speed boats having convexly curved sides converging at their forward" portions toA form a sharp-pointed bow.

My boat is of staunch construction, `and f this construction with other details andadvantages of my invention not hereinloefore ings, in which `Figure 1 is a side .elevation of a boat lonstructed in accordance with and einbodying my invention; j

Fig. 2 is a top elevation. of4 the same; Fig. 3 is ,aybottom viewof the saine;

r Fig` L is a ,vertical transversesection, on

a larger scale, through thesaine taken on the dotted line 4 4 of Fig.1;`

Eig. c is auf and eleventh of a; portion l straight.

shown inFig. l.

boat, and this view shows the side of said `:trame reversed to that presented in Fig. 4:;

Fig. 7 is a detached perspective view of `a portion of the same; ments in Boats, of which the following is j the side of the hull being omitted, and

Fig., 9 is a `detached perspective view,

partly broken away, of the frame construction at said step or riser.

In the drawings, 10 designates theoppoin Fig. `2, ris transverse `and .preferably The bowportion of the boat is preferably covered over by a deck 14:, in rearof which is provided a commodious compartment 15 for passengers, engines and equipment customary to power-driven high-speed boats. The forward edge of the bow llis deieoted downwardly and forwardly at an angle,"as` shown at 16, and the side portions of this angular. edge curve forwardly to a slight extent, as at 17, while intermediate `said j portions 17 the said angular edge curves inwardly on a concave line, as at 18. The construction of` the sides of the boat with reference thereto, are features lof special importance. j j j `The sides l0 are substantially ,parallel .l from bow to stern and of' concave outline ,in vertical cross-section throughout their length, llosing projected outwardly along their lower portions beyond the vertical planes of the upper edges of said sides, as

\ The sides 1Q are constructed with a; yseries -of spaced-apart vertically disposed ribs `19,

which curve inwardly to provide the correct shape for said sides and uponwhich the exterior side planking 20`(Fig. 4) is l.secured The ribs.19 are` connected together` and braced` adjacent their upper and lower portions by longitudinal beams `21 `(ligianfl),

and adjacent to their lower ends the ribs 19 are connected `w1th transverse, beams, 22

which extend across the boat,while at their entreiiialoweifends said` ribs are secured to upwardly and `inwardly inclined braces Q3,

whose upper ends are secured to said transverse beams 22. I preferably interpose blocks 24 directly below the ends of the cross-beams 22 and alongside of the ribs 19, and the lower ends of these blocks are be tween said ribs 19 and the outer ends of the braces 23, as shown in Fig. 6, and are secured to said ribs and braces and increase the strength of the general structure. I also preferably secure auxiliary brace-bars 25 against the braces 23, and these bars extend up to the lower edges of the cross-beams 22 and aid in supporting the same.

I further increase the strength of my boat structure with the use of vertical bars 26 whose upper ends are rigidly secured to the inner faces of the ribs 19, whence said bars 26, extend downwardly and are secured to the cross-beams 22 and brace-bars 23, 25.

The foregoing description of the ribs 19, cross-bars 22, braces 23y auxiliary braces 25 and vertical rods 26 applies to those portions ofthe boat removed from steps or risers 27 which I provide in the bottom of the boat and toward the stern thereof, and at the location of these steps or risers 27 I provide ribs and rods lCorresponding with the ribs 19 and rods 26, but by reason of their being diii'erently associated with other features. of the boat, I number said ribs 28 and said rods connected with them as 29. At thev location of the steps or risers 27 I arrange theside ribs of the boat in pairs, as v indicated by dotted lines in Fig. 1 and solid lines in Figs. 8 and 9. The ribs 28 are concaved inwardly, the. same as the ribs 19, and they extend downwardly to the bottom of the boat and are secured to a pair of transverse beams 30 which areconcaved at their lower sides, as at 3l (Fig. 9), and extend out to the lower outer side edges of the boat at the angle at which the sides and the bottom of the boat meet. The rods 29 are vertical and secured at their upper ends to the ribs 28, while at their lower portions they are secured t0 the transverse beamsk 30, as

y,will be clearly understood on reference to j Figs. 8 and9. VThe steps or risers 27 are not y separately claimed herein, because they are not new featilles in speed'boats.

The bottom 12 of the boat 1s gently concavedupwardly on transverse lines, from lthe bow Vto the stern of the boat. as indicated bythe dotted lines, in Fig,l 1 and by solid linesuin Fig. 4, and said bottom 12 is formed'` of,` longitudinal planliing rigidly secured to the transverse braces 23, auxiliary bracebars 25, transverse or cr,os's-beams"22 and beamsO, the'Icross-beams 22being concavedas represented iny Figs. 1f and 6, and thebeams being similarly concaved to presentV gradually concavingsurfaces adapted to yreceive the planking of the'bottom 12- which planling number 32 in Fig. The ytottoilfljof, thsfbeaft. @spatially at #he .errer I special construction of the sides of the boat to secure by Letters-Patent, is:

portion thereof, presents a continuous surface extending from the bow to the stern of the boat, as denoted by the dotted lines in Fig. 1, and said bottom at the opposite side edges of the boat at the steps or risers 27, present non-continuous edges, as will be apparent on reference to Figs. 1 and 3. The forward portion of the bottom 12 inclines upwardly along the .bow end of the boat, and at the rear of said upwardly curved portion the bottom 12 extends on substantially flat longitudinal lines to the stern of the boat.

' The compartment 15 is formed of substantially vertical sides and a fiat bottom and is colkllposed of durable planking secured, at the sides of the compartment, to the ribs 19, rods 26, planking 21, ribs 28 and rods 29, while the planking for the Hooring of the compartment 15` is secured upon the upper edges of the cross-beams 22 and beams 30.

My boat as a whole has been designed to present a durable seaworthy construction and one capable of high-speed.

My in vention will be largely understood from the foregoing description so that further extended detailed explanation is not required. I may mention, however, that when the boat is in use and driven by high power, so as to create speed, the bow of the boat rides upwardly in and over the water due to the construction of the bow portion of the boat and the bottom thereof, while the stern of the boat partly submerges. The

in cooperation with the construction defined `for the bottom of the boat, permits the attainment of high speed without danger of the boat'turning over, and also assures easy, steady, safe-riding of the boat on and partly in the water. The exterior shape of my boat and its bottom construction contribute to high efliciency so that the boat constructed as described may employ engines of high H. P. Among the purposes I have accomplished by my construction of boat, is the attainment of high speed, steady and safe riding and capability of short turning or deiection within limited space, My construction of boat also permits me to use engines of high H. Rand to minimize friction and resistance, all this being true even though the boat of my invention is comparatively broad with blunt bow and stern portions, as distinguished from high speed boats having sharp pointed bows and outwardly convexed sides vand which otherwise lack the characteristics of my boat.

What I claim as my invention and desire 1. yA boat .of the character described having e substantially parallel sides which are extended downwardly and outwardly along their lowerv portions from bow to stern, the lower edges of said sides being set outwardly beyond the plane of the upper edge of said sides and meeting the bottom of the boat at an angle.

2. A boat of the character described haying substantially parallel sides which are concaved inwardly on Vertical planes from bow to stern and the lower edges of which sides join the bottom of the boat at an angle.

3. A boat of the character described having substantially parallel sides which are concaved inwardly on Vertical planes from bow to stern and from their upper to their lower edges, and the lower portions of said sides being extended outwardly beyond the vertical plane of the upper edges of said sides.

4. A boat of the character described having substantially parallel sides from bow to stern and whose lower portions extend outwardly beyond the vertical plane of the upper edges of said sides, and a bottom which is concaved upwardly from bow to stern and meets the lower outwardly projecting members of said sides at an angle.

5. A boat of the character described, having substantially parallel sides from bow to stern, and a concave bottom, the boat structure comprising inwardly concaved side ribs, exterior planking secured thereto, depending rods secured to the inner faces of said ribs, transverse beams secured to said ribs and rods, upwardly inclined braces secured to the lower ends of said ribs and rods and to said cross-beams, and bottom planking secured to said braces and cross-beams and joining the outer planking of said sides at an l angle.

6. A boat of thecharacter described having substantially parallel sides from bow to stern and whose lower portions turn outwardly beyond the vertical plane of the upper edges of said sides, and a bottom which is concaved upwardly from bow to stern and meets the lower outwardly projecting members of said sides at an angle and which bottom curves upwardly at its bow portion and in rear of said portion is formed at its edge portions with a plurality of risers or ste-ps.

wardly toward the bow-line of the boat and 1n rear of said portion being extended toward the stern of the boat on substantially fiat longitudinal lines.

Signed at New York city, in the county of New York and State of New York, this 23rd day of April, A. D. 1919.

FRANK O. MITTAG. Witnesses:

ARTHUR MARION, CEAS.' C. GILL.

Copies of this patent may be obtained for ve cents each, by addressing the commissioner of Patents, Washington, D. C. 

